Update Dockerfile

Dockerfile

@@ -1,10 +1,9 @@
 FROM python:3.12
-
-WORKDIR /code
 RUN pip install --upgrade pip
 RUN pip install flask
-RUN mkdir /code/templates
-COPY index.html /code/templates/
-COPY . /code
+RUN mkdir /app/templates
+WORKDIR /app
+COPY index.html templates/index.html
+COPY . /app
 
-CMD ["python3 /code/app.py"]
+CMD ["python3 app.py"]